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3 Sheets-*Sheet 1.

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C. W. GLIDDBN & C. II. BENJAMIN.

@BINDING MACHINE.

Paten'ted July 30, 1895.

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3 Sheets-Sheet 2.

C. W. GLIDDEN 8v G. H. BENJAMIN. @BINDING MACHINE.

No. 543,647. Patented vJuly 30.1895.

{No Model.) A

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C. W. GLIDDEN 82; O. H. BENJAMIN. GRINDING MAGHNE.-

No. 543,647. Patented July 30, 1895.

UNITED PATENT Ori-rice.

CHARLES W. GLIDDEN, LYNN, MASSACHUSETTS, AND CHARLES H. BEN- JAMIN, OF CLEVELAND, OHIO, ASSIGNORS TO JAMES W. BROOKS, TRUS- TEE, OF CAMBRIDGE, MASSACHUSETTS.

GRINDINGQMACHINE.

SPECIFICATION forming part of Letters Patent No. 543,647, dated July 30, 1895.

Application tiled July 16. 1891. Serial No. 399,704. (No model.)

To all whom it may concern:

Be it known that we, CHARLES W. GLID- DEN, of Lynn, county of Essex, State of Massachusetts, and CHARLES H. BENJAMIN, ofv

Cleveland, county of Cuyahoga, State of Ohio,

have invented an Improvement in ,Grinding- Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters and numer- Io als on the drawings representing like parts.

Heel-trimming cutters as now commonly made are composed of a lseries of blades having curved cutting-edges corresponding in shape to the shape of the side edges of the heel to be trimmed. These blades act on the heel successively, and hence must be of the same shape in order to make the same shaped cut, that one will not undo what the preceding one has just done. These blades likezo. wise need sharpeningv frequently, and it has been found to be a Very difcult task to grind a series of blades alike.

This invention has for its object to construct a grinding-machine especially adapted 2 5 for accomplishing this result, and it comprehends the employment of a grinding-wheel, a blade-carrying frame adapted to hold the blades and present them to the grindingwheel to be sharpened, and two co-operating 3o tempets, the acting face of one of which is herein shown'as made as a counterpart of the acting face of the grinding-wheehand the acting face of the other of which is made as va counterpart of the blade to be sharpened. The templet corresponding to the grindingwheel is shown as held in fixed position, yet made adjustable toward and from the axis of rotation of the grinding-wheel, and the ternplet corresponding to the blade is held in a 4o frame connected with the blade-carrying frame,- so as to be moved in either direction simultaneously. A truing-tool -is provided for the grinding-wheel, which is designed to continuously maintain a., grinding-surface corresponding with the surface of `the stationary templet. Adjusting devices are provided for the parts. t

Figure 1 shows in front elevation a grinding-machine embodying our invention; Figs.

2 and 3, details of binding devices to be re- 5o ferred to; Fig. 4, a plan view of the machine shown in Fig. 1, and Fig. 5 a right-hand side View of the machine shown in Fig. 1.

The main framework, of any suitable construction supporting the operating parts, is erected on a column or stand A. The shaft a, having its bearings in arms 2 3 of the main framework, has secured to and mounted on it a fast and loose pulley o. a2, a grindingwheel a3, and a pulley a4. The' periphery or 6o acting face of the grinding-wheel a3 ismade convex.

A stand b,loosely mounted on a rod b', supported in arms 4 5 of the main framework, has at its upper end two guide portions 57 58, 65 the inner adjacent faces of which are dovetailed to receive between them a foot-plate or base b9 of a yoke bm. A headed pin Z112, having a screw-threaded end, or it may be a screw, passes through the guide portions o7 bs of the 7o stand b, and a hand-piece bw, provided with a socketed end, internally screw-threaded to engage the screw-threaded end of the pin 512 and adapted to bear against the outer side of the portion 68, is employed as va means for drawing the guide portions hl bs, slightly toward each other to bind the foot-plate or base 'b9 firmly between them, such clamping device permitting adjustment of the yyoke hw. The yoke blo supports at its upper end, and on each 8o arm h2 b3 thereof va pivoted frame h4 b5.

The pivoted frame b4 is made as a plate, having on it a standard h6, provided with a hole through it transversely at its upper end, through or into which the shaft c of a heeltrimming cutter c is placed.

As a means of holding the shaft c and heeltrimrning cutter borne by it in fixed position, that one or another blade thereof may be presented to and acted upon by the grinding- 9o wheel, we have herein shown a screw c2, (see Fig. 3,) passing through a hole in the support h6, which crosses and cuts into the hole containing the shaft c, and the shank of said screw is cut away, as at c2", and adapted to bear against 9 5 the shaft c more or less as the screw ismoved longitudinally, and a hand-piece c3, having engages the end of the screw c2 and also bears against the standard h6, so that by turning the said hand-piece the screw c2 will be moved longitudinally to irmly hold or release the shaft c, according to the direction the handpiece is turned. A dog c5 is secured to the top of the standard b, which is designed to engage the heel-trimming cutter to assist in holding it in position.

. The blades of the heel-trimming cutter are in line with the grinding-wheel, as represented in Fig. l, and by moving the blade-carrying frame b4 on its pivot the blade to be sharpcned and having a convex cutting-edge is carried across a portion of the convex grindingface of the wheel a3.

As a means of guiding the blade to be sharpcned, so that the several blades of the heeltrimming cutter shall present a similar cutting-edge that they may act in succession upon a heel and make the same cut, we have provided a templet c, (see Figs. 4 and 5,) shown as a block havinga curved convex face lying concentric with the convex grinding-face of the wheel a3, said block being attached by a bolt and nut to a standard e formed integral with or attached to a foot-plate or base e2, which occupies a position between the arms es e4 of a yoke e5 erected on the main framework, a headed pin, like bm, passing through said arms, and a hand-piece, like 513, being provided for drawing the arms slightly together and thereby binding the foot-plate or base c2 firmly between them. The foot-plate or base e2 has on its under side a lug or ear, through which passes a screw-rod e9, having secured to it or formed integral with it two annular projections e, which receive between them a lug or ear el@ on the standard e5, a handwheel cl2 being provided for rotating said screw-rod c. The templet e is moved toward and from the center or axis of rotation of the grinding-wheel by means ot' this adjusting device. Another templet e6 is provided which bears against the templet e, said templet e havinga curved edge conforming to the shape which it is desired to give to the cutting-edge of the blade to be sharpened. The templet e is held in position by a clamp e7 secured to the pivoted frame b5 on the arm b3.

The pivoted blade-carrying frame b4 and the pivoted templet-carrying frame b5 are connected by a rod or bar es, so that they shall move simultaneously, or as the blade-carrying frame is swung across a portion of the grinding-face of the wheel a3 the templet e6 will be carried across a portion of the face of the templet e, so that the cutting-edge given to the blade by grinding will conform to the shape of the templet e6. A chain f connects the yoke b with the column A to limit its movement away from the grinding-wheel.

It is essential that the convexity of the peripheryot' the grinding-wheel a3 shall remain the same at all times and that it shall conform to the convexity of the teinplet c, and hence we provide a truing device for said grinding-wheel, which, as herein shown, consists of a truing-tool g, held in fixed position by a set-screw or otherwise in a block g', which is dovetailed and moves on a semicircular bed g2, attached to a block g3, located between the guide portions g4 g4, formed integral with or attached to an arm 6 on the main framework, being held in place between said portions by a clamping device similar to that shown 1n Fig. 2 and made adjustable longitudinally by means of a screw-rod g5, rotated by a handwheel gf.

The truing-tool g acts upon the grindingface ofthe wheel a3 ata single point, but as it is moved on the semicircular bed g3 it acts upon all parts of said periphery from side to side as the grinding-wheel is revolved.

A suitable bearing-frame 7L is mounted loosely on the rod b', which frame affords a proper bearing for a shaft h', carrying a pulley 7t2, over which passes a belt h3, which also passes over the pulley a4 on the main shaft c. A rod or barw is connected to the main frame at one end and to the frame h at the other end, by means of which said frame h is held in fixed position with the belt tight. A grinding-Wheel h4 is secured to the shat't 72,. A bracket h5 is formed integralwith or secured to the frame h, upon which is placed a plate h6, held in proper position by a set-nut hi, a

."post hs rising from said plate and carrying a plate hg, which serves as a holder for a randcutting tool hw.

The grinding-wheel h4 is made quite narrow to enter between the teeth of the rand-cutting tool to sharpen them.

`We do not desire to limit our invention to the employment of all the parts herein shown, as good results maybe produced when some are omitted; also, we desire it to be understood that many ways may be devised for carrying out this invention, the essential feature being the employment of two co-operating templets in combination with a grindingwheel and blade-holder, one of said templets being a counterpart in shape of the acting face of the grinding-wheel and the other being a counterpart in shape of the blade to bc sharpened.

We claim-- 1. In a grinding machine, a grinding wheel, and a tem plet corresponding thereto in shape as described, combined with a blade carrying frame, and another templet corresponding to the blade as described, and an adjustable yoke supporting both said blade carrying frame, and last named templet, substantially as described.

2. In a grinding machine, a grinding Wheel, and templetl made as a counterpart of it, shaped as described, combined with a'pivoted names to this specification in the presence of two subscribing witnesses. CHARLES W. GLIDDEN.

CHARLES H. BENJAMIN.

Witnesses:

H. P; FAIRFIELD, W. EUsTIs BARKER. 

